Enter HR Derby Bracket Challenge today

Perhaps the most exciting contest relating to one of the most exciting events on the baseball calendar is officially back.

Fans can enter the T-Mobile Home Run Derby Bracket Challenge ahead of the T-Mobile Home Run Derby on Monday at Nationals Park in Washington, D.C. (8 p.m. ET on ESPN). Make round-by-round predictions of the eight-player Derby for the chance to win four tickets to the 2018 World Series and a $500 Mastercard gift card.

Perhaps the most exciting contest relating to one of the most exciting events on the baseball calendar is officially back.

Fans can enter the T-Mobile Home Run Derby Bracket Challenge ahead of the T-Mobile Home Run Derby on Monday at Nationals Park in Washington, D.C. (8 p.m. ET on ESPN). Make round-by-round predictions of the eight-player Derby for the chance to win four tickets to the 2018 World Series and a $500 Mastercard gift card.

• Visit mlb.com/bracketchallenge and follow the instructions to complete the entry form ("Entry Form") inclusive of registering to participate in the contest• Follow the instructions provided to complete the bracket• Make your selections for which players will win each round• Make your prediction of the final home run totals for each of the players participating in Round 3• Answer the tiebreaker question asking for a prediction of the longest home run's distance during the Home Run Derby (as determined by Statcast™)

Entries must be received by Monday at 7:59 p.m. ET to be eligible.

In the event one of the eight participants drops out, a replacement will be named by MLB, at which point it is the contestant's responsibility to resubmit a new bracket should they determine it would impact their selections for any matchup.

Here is how scoring is determined:

• Five points for each correct Round 1 choice• Ten points for each correct Round 2 choice• Fifteen points for correctly selecting the Home Run Derby champion

A perfect score would be 55 points if a participant correctly selects every winner in all three rounds of the Derby.

Only one entry will be allowed per valid email address or telephone number.